address review feedback

.github/PULL_REQUEST_TEMPLATE.md

@@ -3,7 +3,7 @@
 
 Depending on what your PR does, here are a few things you might want to address in the description:
 + [ ] what are the (breaking) changes that this PR makes?
-+ [ ] important background, or a details about the implementation
-+ [ ] are the changes covered by tests and docstrings?
++ [ ] important background, or details about the implementation
++ [ ] are the changes—especially new features—covered by tests and docstrings?
 + [ ] consider adding/updating relevant example notebooks
 + [ ] right before it's ready to merge, mention the PR in the RELEASE-NOTES.md